The figure not drawn to scale shows a cubical tank which is
13 filled with water.
- What is the volume of water needed to fill up the tank to the brim?
- Water is added to the tank at a rate of 8 litres per minute. At this rate, how long will it take to fill the tank completely? Give your answer in this format. (Eg 1 h 20 min)
(a)
Fraction of water needed to fill the tank to the brim
= 1 -
13 =
23 Volume of water needed to fill the tank to the brim
=
23 x 120 x 120 x 120
= 1152000 mℓ
1000 mℓ = 1 ℓ
1152000 ÷ 1000 = 1152 ℓ
(b)
Time needed to fill the tank completely
= 1152 ÷ 8
= 144 min
60 min = 1 h
144 min = 2 h 24 min
Answer(s): (a) 1152 ℓ; (b) 2 h 24 min